US2729952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption refrigeration apparatus
Assignee: Servel Inc
•
Filing: 1952-07-11
•
Granted: 1956-01-10
•
Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Whitlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:17
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2563574A
Cited
DE285026C
Cited
US187354A
Cited
US284515A
Cited
GB189416028A
Cited
DE141898C
Cited
FR331120A
Cited
US1407013A
Cited
US1713934A
Cited
US1961297A
Cited
US2099201A
Cited
US2196911A
Cited
US2280210A
Cited
US2276977A
Cited
US2365797A
Cited
US2372309A
Cited
US2511568A
Cited
US2498945A
Cited
US2559217A
Cited
US2623366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |